"4. Lower the RAM speed to 166MHZ for DDR 400, or 133MHZ for DDR 333. Stock will be 200MHZ for DDR 400 and 166MHZ for DDR 333. For DDR2, lower it to 667 for DDR 800, or 533 for 667 (Depending on your RAM and how far you want to OC, you might be able to leave this alone. More explantion below)"

in my bios i have a section called memory clock mode is this what you are refering to in the above statement? if so i have Crucial Ballistix 2GB (2x1GB) DDR2 PC2-6400C4 800MHz Dual Channel Kit x2 but in the options in this section i have 200,266,333,400,533 what should it be set at?

also what setting do i change to lower the cpu voltage is that the (vid)? i put it lower in bios but cpuid still shows it the same

http://valid.canardpc.com/show_oc.php?id=481203
Sadly this beast would go sooo much further with

honestly as long as your temps are low you have little to worry about. I had a 4200+ running 1.5v but that was under custom liquid. There is a point where more V will not help any more. I would just say watch your temps very carefully.

As some of you may know im venturing into OCing my Athlon 64 X2 4800+ brisbane, and am curious about one thing. I've seen in some posts people lowering the core multiplier, stock on mine is 12.5x. My question is what advantages does this have, and should I start doing it at some point to help safe guard my cpu from suffering any damage?

As some of you may know im venturing into OCing my Athlon 64 X2 4800+ brisbane, and am curious about one thing. I've seen in some posts people lowering the core multiplier, stock on mine is 12.5x. My question is what advantages does this have, and should I start doing it at some point to help safe guard my cpu from suffering any damage?

Click to expand...

Higher voltages = more heat.
Too much heat and no temp monitoring can harm a CPU.

As some of you may know im venturing into OCing my Athlon 64 X2 4800+ brisbane, and am curious about one thing. I've seen in some posts people lowering the core multiplier, stock on mine is 12.5x. My question is what advantages does this have, and should I start doing it at some point to help safe guard my cpu from suffering any damage?

Click to expand...

I don't think anyone really answered your question. The reason why people will lower the multiplier is so that they can raise their FSB. They often do this when they hit the limit on their CPU, but not on the motherboard and memory.

For example, if you had a processor that maxed out at 3GHz (10x300), but you have a motherboard and memory that can run at 400 FSB, you can "unlock" that extra performance by lowering your multiplier and changing your CPU to 3Ghz (7.5x400).

Edit: I think some people might tell you that you can reach a little higher on your end-result CPU frequency if you do this too. Also, the processor will often become slightly more efficient when you trade your multiplier for bus speed.

(...)
For example, if you had a processor that maxed out at 3GHz (10x300), but you have a motherboard and memory that can run at 400 FSB, you can "unlock" that extra performance by lowering your multiplier and changing your CPU to 3Ghz (7.5x400).

The older K7's were rather limited on the system bus. I'd imagine that's where this rumor originated. With the introduction of HT, I can only assume that bus saturation is no longer a problem. Still, bus bandwidth aside, I just heard rumors (I stress that they're only rumors) that FSB is more important than your multiplier in the sense that you gain a very small performance increase.

Also, as far as I know, most older systems (such as mine) can not push RAM clock above the system's FSB. The only dividers that I've seen (on my DFI nForce3, which I consider to be a very respectable board for it's time) are ones that lower the RAM clock. The only option that I know of is to lower the multiplier and raise FSB.
Newer motherboards may allow this, but I have not dealt with any that have. Seeing as how this is not an option for all boards, trading your multi for FSB would, as I said, "unlock extra performance".

I don't understand why you say 1:1 doesn't exist. I could understand that on AMD systems, the 1:1 ratio is translated to be used off the CPU core clock, becoming a 7.5:1 ratio.
When I say 1:1, I mean 1MHz FSB to 1MHz RAM.

If RAM clock is 375MHz, and FSB is at 400Mhz, how is that 1:1?
You're telling me that my Sempron 3400+ and PC3200 memory runs at 200MHz FSB and 187 MHz RAM (DDR 375?) despite having a "1:1 ratio in the BIOS".

Ah. The lightbulb just clicked. There is no such thing as a 7.5 memory divider, and it would be rounded up to 8. I know that FSBxMulti=CPU/*something*=RAM, but what didn't click right away is that memory dividers don't increment in half steps.

quick question on stability testing, i was running orthos and after 4 hour and 20 mins of running (man that # would have so much more meaning to me if i was still smoking) one of the cores registered 100 warning from illegal sumouts, there were no errors on either core and the max temp was 43C (monitoring from both everest and speedfan), so I am wondering if that means that either i should up the voltages (1.42 currently) or lower the fsb (256mhz currently), link to screen shot of cpu-z http://www.prairiejoes.com/joe/cpuz.png

So I got a 5000+ BE and have a question about the temps, in the main post is says keep the temps under 45c at max load, but from the AMD site it says the max temps are 55-68c and in another thread I read Brisbanes are rated at 72c, so my question is, how safe is it to go about 45c at full load during stability testing?